Wrench.



No. 761,110. PATENTED MAY 31, 1904.

I W. A. STEWART.

WRENCH.

APPLIOATION FILED JULY 11, 1903.

N0 MODEL.

UNITED STATES Patented May 31, 1904.

PATENT OFFICE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 761,110, dated May 31, 1904.

Application filed July 11, 1903.

Serial No. 165,175. (No model.)

Be it known that I, WILLIAM A. STEWART, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Wrench, of which the following is a specification.

My invention is an improvement in wrenches, having for its object a wrench adapted for heavy work of all descriptions and also having for its object new means for locking the sliding jaw in position with reference to the stationary jaw.

My invention consists in thenovel features of construction and combination of parts described hereinafter, particularly pointed out in the claims, and shown in the accompanying drawings, in which- Figure 1 is aperspective view of my wrench. Fig. 2 is a side elevation, the movable jaw being in section and the handle broken away. Fig. 3 isa transverse section on the line 3 3 of Fig. 2. Fig. 4 is a detail perspective view of the movable jaw. Fig. 5 is a plan view of the under side of the pawl.

In the drawings, A represents the usual bar-handle, terminating at one end in a stationary jaw A, the upper portion of said jaw having its inner face offset, as at A The bar A has a smooth upper surface adjacent the jaw A, and to the rear of this smooth portion forwardly-projecting rack-teeth A are formed. Sliding on this bar and over the teeth is a movable jaw B. This jaw is shown in detail in Fig. 4 and has the central opening B. Projecting rearwardlyfrom the jaw is an integral arm B the upper surface of which is flush with the bottom of the opening B. Projecting rearwardly fromthe jaw above the opening is a short arm B terminating in perforated lugs B, the perforations of the lugs reg- I istering. A pawl C is formed with a central forwardly-extending lug C, also perforated. This lug fits between the lugs 13", and a pintle B pivotally secures the pawl to the short arm B the length of the pawl plus the short arm being equal to the length of the long arm B A longitudinal groove B is formed on the under side of the short arm, and a similar groove G is formed on the under side of the I pawl. Teeth 0 adapted to coact with the teeth A are formed on the pawl on each side of the groove C A spring-plate D is arranged in these grooves extending under both of the short arm and the pawl and being secured by a countersunk screw D to the short arm, the free end of the spring being adapted to lift the pawl out of engagement with the teeth A Pivotally secured to the sides of the pawl adjacent its rear end are the free ends of an open rectangular clip E, the frame of said clip inclosing the bar and long arm, as shown in Fig. l, the horizontal member of said frame or clip lying when the pawl is in engagement with the teeth A some distance below the long arm, permitting vertical movement of the clip when the spring lifts the pawl. A set-screw E works in a threaded perforation formed in a boss E on the horizontal member of the clip, the upper end of the screw engaging a socket on the under side of the long arm.

The operation of my wrench will be readily understood. By turning-the set-screw in one direction the clip will be drawn downward, clamping the pawl into engagement with the teeth A but by turning the screw in the opposite direction the spring I) will be given play and will lift the pawl out of engagement with the teeth A and the jaw B can slide along the bar. The oflset face A permits use of the wrench on nuts of two sizes with one adjustment.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A wrench comprising a bar having a stationary jaw, thereon, teeth formed on said bar, a movable jaw sliding on the bar, a pawl pivoted to the rear of the movable jaw, a spring secured to said jaw and extending beneath the pawl, and adapted to lift the pawl, and means for locking the pawl in engagement with the teeth of the bar.

2. A Wrench comprising a bar carrying a stationary jaw and having a toothed portion, a movable jaw sliding on the bar, said jaw having a central opening and integral, rearwardly-projecting arms above and below the opening, the lower arm being the longer, the shorter arm having a longitudinal groove tionary head at one end thereof, said head having a portion of its inner face oifset, a movable aw sliding on the bar, teeth formed on said bar, a pawl pivoted to the rear of said head and engaging the teeth, a spring adapted to disengage the pawl, a clip pivoted at its free ends to the pawl, and a set-screw work- I5 ing in the clip and engaging the under side of the movable jaw.

WILLIAM A. STEWART.

Vvitnesses:

GEORGE MoUoNAsnIE, GEO. F. STANDLEY. 

